Method of making tires.



"NITED STATES PATENT FFIQE.

JAMES C. ANDERSON, OF HIGHLAND PARK, ILLINOIS.

METHOD OF MAKING TIRES.

SPECIFICATION formingpart of Letters Patent No. 637,692, dated November21, 1899.

Original application filed June 14, 1899, Serial No. 720,514. Dividedand this application filed July 21,1899. Serial No. 724,683. (No model.)

To all whom, it may concern.-

Be it known that I, JAMES C. ANDERSON, a citizen of the UnitedStates,-residing at Highland Park, in the county of Lake and State ofIllinois, have invented certain new and useful Improvements in Methodsof Making Tires; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to a certain new and useful method of making tiresupon wheels and repairing the same.

In an application filed by me on the 14th day of June, 1899, Serial No.720,514, of which this is a division, I have shown and described anapparatus especially designed for carrying out my improved method, andreference is made to such application.

The object of my invention is to produce a tire having the propertiesand characteristics fully described in another pending application filedby me on the 14th day of June, 1899, Serial No. 720,516, and which tireis composed of asphaltum or bitumen as a base and upon which is built atread-surface composed of asphaltum mixed with sand, corundum, or othersimilar comminuted material.

My present invention has for its object a method of forming the tire sothat it shall be absolutely composite and without definable joints ofany character whatever; and it consists in the steps hereinafter and indetail explained.

When the rim of a wheel has been provided with a suitablecircumferential box or receptacle for the tire, as described inapplication Serial No. 720,516, above referred to, I deposit in saidreceptacle asphaltum or bitumen or other similar viscid material and toa depth or thickness equal to about one-third or onehalf of the depth ofthe circumferential box or receptacle, and While this deposit is beingmade the wheel is rotated upon its axis,which may be a journal of anycharacter or the axle of a vehicle. I prefer to deposit the asphaltum orequivalent in a thin continuing layer in substantially the manner thatribbon is wound upon a block, so that no joints will occur.

When the tire has been thus built up to the proper or desired heightwith asphaltum or equivalent material, I then in the same manner apply acomposition of asphaltum, bitumen, or similar viscid material and sandor equivalent to complete the height or depth of the tire, and whileapplying the asphaltum and sand or equivalent I gradually increase theproportion of the latter to secure the proper degree of hardness for thetread-surface of the tire and to secure the proper retention of its formor profile and to enable it to resist undue indentation or abrasion inits contact with an ordinary roadway. The proportions of asphaltum andsand or equivalent can be best determined by adopting the formulaeemployed in making asphaltum roadways, which Vary according to theclimatic conditions in localities where they are used.

In order to secure any desired design of cross-section profile of thetire, any suitable scraper or tool may be employed which will subservethe further purpose of controlling the thickness of the successivelayers and removing any excess of material.

When a tire composed of the material described and made by my improvedmethod becomes defaced or worn and it is desired to restore it to itsoriginal condition, I beat the exterior surface, and while so heated Iengraft upon it asphaltum and sand or its equivalent in the manneralready described.

Having described the manner in which I carry out my improved method,what I claim as new, and desire to secure by Letters Patent, is-

1. The herein-described method of making tires upon wheels, whichconsists in depositing fluid asphaltum or bitumen, and asphaltum orbitumen mixed with sand or its equivalent, within a suitable receptaclesurrounding and secured to the rim of the wheel, while the wheel isrotated, and removing any excess of asphaltum and sand and giving tothat which remains any desired design or profile.

2. The method herein described of forming tires on wheels provided witha tire-receptacle, which consists in revolving the wheel and during therotation thereof depositing in the tire-receptacle a suitable quantityof asphala n 373 2 'tum'or bitumen while in a fluid condition;testimeny'whereof I affix my signature andsuperi'mposing upon such basewhileiinr in presence of 0W0 witnesses.

aplasoicconditionacompositionofasphaltutn or bitumen andsandor' itsequivalent, grad-a JAMES A E 5 ually increasing the proportion of sandor itsv Witnesses: V V

equivalent, substantially as hereinbefore set y N. CURTIS LAMMOND,

forth. JNo. J. HABROWER.

